%0 Journal Article %A M. Artin %A J.T. Stafford %T Noncommutative graded domains with quadratic. %J Inventiones mathematicae %D 1995 %P 231-276 %V 122 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1995__122_3_144320/ %F IM_1995__122_3_144320